Resonator.



' 1.1,. COMER.A

` RESONATOR.

' APPL'lCATlON FILED JAN.23, 19H.

kPatented Apr. 27, 1915.

4 SHEETS-SHEET I.

/V/WE/W'OR:

J. J. COMER. RESONATOR.

APPLICATION FILED IAN.23, 19H.

Patented 'Apr.-27, 1915.

' 4 SHEETS-SHEET 2.

WITNESSES Mx/Tom d 1.1. COMER.

Risowoa.

, y VMPLHMTION FILED IAN. 23,1911. I 1 ,137,187, l Patented Apr. 27, 1915.

. l {SHEETS-SHEET 3.

, UNTTED sTATEs PATENT oEEIoE.

JOHN J. COMER, OF CHICAGO,` ILLINOIS, A SSIGNOR TO AUTOMATIC ENUNCIA'TOB.

COMPANY, OF CHICAGO, ILLINOIS, A CORPORATION OE ILLINOIS.

`misoruLToE.. 1

f Specification of Letters Patent. Patented Apr. 2.7, 1915.

Application led January 23, 1911. Serial No.l 604,143..

To all wh-om 'it concern: l

Be it known t at I, JOHN J. COMER, a citizen of the United States `of America, and

resident of Chicago, Cook county, Illinois,

have invented a certain new and useful Improvement in Resonators, of which the following is a specification.

My invention relates to resonators in general, such, for example, as those employed on talkingmachines, loud-speaking telephones, horns and megaphones, and other things of similar nature.

The principal object of mv invention is to provide a construction whereby the length of the resonator may be reduced considera ly without impairing the eiiciency thereof. AIn other words, and by my invention, a short resonator is capable of producing as good results as a much longer one of the old style. i,

It is also an obj ect to provide a resonator vadapted more especially for use on loudspeaking telephone receivers for conversational or musical or similar purposes requiring ampliication of the sound to produce the desired eect.

To the foregoing and other useful ends my invention consists in matters hereinafter set forth and claimed.

In the accompanying drawings-Figure 1 is a longitudinal section of a reson 1to1 embodying the principles of my invention,

showing a telephone receiver, of the loud speaking type, disposed within the outer or larger end of the resonator, whereby the same may be used, for example, for transmitting music telephonically Fig. 2 is a front elevation of the structure shown in Fig. 1. Figs. 3 and 4 are similar views showing a different form of my invention. Figs. 5 and 6 are similar views showin still another form of my invention. Figs. and

8 are similar views showing still another form of my invention.

As thus illustrated, and referring more particularly to Figs. Y1 and 2, my invention comprises an. outer bell-mouthed section A, having its small end closed by a diaphragm or plate a, and an inner section B, which latter is also tapered in one direction, but the two sections being disposed in directions. The telephone receiver is arranged to enunciate into the small-end of the faposite inner section B, and may be of any suitable character. may be of sheet metal or any other suitable material. The larger end of the inner section B is of less diameter than the smaller end of the outer section A, whereby the sound waves coming out ofthe said inner section Will impinge upon the wall a, .be defiected thereby, and then travel back outside` of the inner' section and out through the larger end of the outer section A, being thus successively amplified by telescoped resonator sections disposed alternately in opposite directions. In this way a short resonator is capable of producing a resonating effect as v good, or substantially so, as with one much longer of the ordinary form. And, moreover, the bell mouth of the resonater becomes the inclosing chamber for the sound-produc ing device.

Figs. 3 and 4 show substantially the same construction as that previously described,

except that in this case the inner section B is reversed, and 'a third' or intermediate' sec tion D interposed between said inner section andv the olter section A, the construction carrying out the idea of alternately reversing the sections to obtain in a short resona-- tor the effect of a long one of the old type.

In Figs. 1 and 2, the receiver C is sup* ported on the end of the inner section B,

and the latter is supported by spiders b that are secured 4to the outer section A inlany suitable manner. In Figs. 3 and 4, however, the receiver C is secured to the end wall of the outer section, and the section D is supported by the spider cl attached rto the inner section B, which latter is secured to the receiver.V

In Figs. 5 and 6, the construction is practically the same as; in Figs. 1 and 2,-..except that the receiver C, instead of being vdis- 9 5 posed inside of the resonator, is mounted vertically on a base c and connected by an elbow c1 with the inner section B, which latter is supported and arranged relative to the outer section A in exactly the same mannenas that shown in Figs. 1 and 2. Here, again, therefore, the resonator, although short, has the same power and effect as a long one of the old style.

In Figs.l 7 and 8, the construction is the 105 `same as that shown in Figs. 3 and 4, except The resonator sections A and B 5,5

,Y versal of the sections,

A may be carried out indefinitely, thereby in effect increasing the length and-size Vof the resonator, but without actually increasing the length.

The proportionsy and adjustment of the sections relative to each other are preferably such that a maximum acoustical effect is produced, which can be ascertainedby moving the sections in and out until the best eii'ect is obtained, which means that the same are 1n then fastening them in such position. o

telescoped sections disposed proper acoustical adjustment, and

What I claim as my invention is:

In an apparatus ofthe class described, the combination of a plurality of resonator horns disposed onev Within the other and tapered in opposite directions and being unrestrictedly open at their larger ends, and' pro# vided with perpendicular Walls at their smaller 1 ends, the larger open end of the inner horn bein of less" diameter than the smaller end of t e outer horn Within which it is disposed, and spaced annularly and endwise from the Walls of and spacer members positioned adjacent both-ends of the inner horn for supporting the inner horn at two separated points Within the outer horn and in concentric relation to said outer horn.

Signed by e at Chicago, Illinois, this 16th day of January, 1911.

JOHN J. COMER.

Witnesses S. LEWIS,

E. H. CLEGG.

said outer horn, 

